For now I send several questinons without any answer. Sorry, for that kind of superkomplex questions.

I run several PSQL Instances on AWS(EC2). During some R&D, I came across turnkey.

I canceled several TurnKey-instances because there was no option to access the turnkey postgres solution via a “normal“ way. My Definiton of „normal“:

Access via SSH-Key with pgAdmin, Navicat-Premium, PG Commander.

All of mine AWS-Instances are accessible. But with turn-key nothing works all approaches for acces via PG Commander, pgAdmin sucks.

Where is the setup-difference of a "normal" Postgres, running on EC2 and a the Postgres from turnkey.

 "Normal" EC2 are accesible turnkey-psql are not. 

Acces via SSH is possible, but pgAdmin, Navicat-Premium, PG Commander fails with Turnkey-Solutions.

Why?

It´s the same setup.